d483eed85f
We have namespaces, so use them for all vfs-exported namespaces so that filesystems can use them, but not anything else. Some in-kernel drivers that do direct filesystem accesses (because they serve up files) are also allowed access to these symbols to keep 'make allmodconfig' builds working properly, but it is not needed for Android kernel images. Bug: 157965270 Bug: 210074446 Cc: Matthias Maennich <maennich@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: Iaf6140baf3a18a516ab2d5c3966235c42f3f70de
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*
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* linux/fs/nls/nls_koi8-ru.c
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*
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* Charset koi8-ru translation based on charset koi8-u.
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* The Unicode to charset table has only exact mappings.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/nls.h>
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#include <linux/errno.h>
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static struct nls_table *p_nls;
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static int uni2char(const wchar_t uni,
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unsigned char *out, int boundlen)
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{
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if (boundlen <= 0)
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return -ENAMETOOLONG;
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if ((uni & 0xffaf) == 0x040e || (uni & 0xffce) == 0x254c) {
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/* koi8-ru and koi8-u differ only on two characters */
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if (uni == 0x040e)
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out[0] = 0xbe;
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else if (uni == 0x045e)
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out[0] = 0xae;
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else if (uni == 0x255d || uni == 0x256c)
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return 0;
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else
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return p_nls->uni2char(uni, out, boundlen);
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return 1;
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}
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else
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/* fast path */
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return p_nls->uni2char(uni, out, boundlen);
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}
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static int char2uni(const unsigned char *rawstring, int boundlen,
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wchar_t *uni)
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{
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int n;
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if ((*rawstring & 0xef) != 0xae) {
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/* koi8-ru and koi8-u differ only on two characters */
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*uni = (*rawstring & 0x10) ? 0x040e : 0x045e;
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return 1;
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}
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n = p_nls->char2uni(rawstring, boundlen, uni);
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return n;
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}
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static struct nls_table table = {
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.charset = "koi8-ru",
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.uni2char = uni2char,
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.char2uni = char2uni,
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};
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static int __init init_nls_koi8_ru(void)
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{
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p_nls = load_nls("koi8-u");
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if (p_nls) {
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table.charset2upper = p_nls->charset2upper;
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table.charset2lower = p_nls->charset2lower;
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return register_nls(&table);
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}
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return -EINVAL;
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}
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static void __exit exit_nls_koi8_ru(void)
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{
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unregister_nls(&table);
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unload_nls(p_nls);
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}
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module_init(init_nls_koi8_ru)
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module_exit(exit_nls_koi8_ru)
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
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